chapter 14

Question 1

what is the half life for zeroth order reactions?

Answer 1

Question 2

what is the half-life equation for first order reactions?

Answer 2

Question 3

what are the units for order reactions?

Answer 3

Question 4

what is the half life equation for second order reactions?

Answer 4

Question 5

what is the collison theory?

Answer 5

the reaction rate is directly proportional to the number of molecular per second

Question 6

what is an elementary reaction?

Answer 6

one that occurs in a single collison of the reactant molecules

Question 7

what is molecularity of an elementary reaction?

Answer 7

number of reactant molecules involved in the collision

• unimolecular
• bimolecular
• termolecular

Question 8

what is necessary for a reaction to be catalyzed?

Answer 8

sufficient energy and proper orientation of the molecule

Question 9

what is a catalyst?

Answer 9

speeds up a reaction, appears in an early step and then is present at the end and is a substance that increases the rate of a chemical reaction without itself being consumed

Question 10

what is the potential energy profile for a two-step reaction in which the first step is rate determining?

Answer 10

Question 11

what does a catalyst do?

Answer 11

lower the activation energy

Question 12

what is homogenous catalysis?

Answer 12

reactants and the catalyst are dispersed in a single phase, usually liquid. it is more advantageous than heterogenous catalysis since it can be carried out under atmospheric conditions

Question 13

what is heterogenous catalysis?

Answer 13

reactants and catalyst are in different phases

Question 14

what is average rate?

Answer 14

Question 15

what is the rate in gas pressure?

Answer 15

O₂ can be substituted with other gases and T has to be in kelvins